Portion of a shoe



FIG. 1 is a perspective view of a portion of a shoe showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a top plan view thereof.

The broken line showing immediately adjacent the shaded region represents an unclaimed boundary of the claimed design. The broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe, as shown and described. 